吡啶和苯酚为碳源短程反硝化动力学研究  

Kinetic study of shortcut denitrification with a mixture of pyridine and phenol as carbon source

作　　者：米静[1] 岳秀萍[1] 张小妹[1] 刘吉明[1] 薄鸿淼 

机构地区：[1]太原理工大学环境与工程学院,山西太原030024

出　　处：《中国环境科学》2016年第2期414-418,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(51378330;51408396)

摘　　要：以吡啶和苯酚共基质作为电子供体,通过摇床实验分别研究了吡啶与苯酚共基质条件下的降解特性以及以NO_2^--N为电子受体的短程反硝化动力学方程.结果表明,苯酚对吡啶有抑制作用,且不论单基质还是与苯酚共基质,吡啶的降解均呈零级反应.其次,采用双底物Monod微分方程对COD、NO_2^--N的浓度变化进行拟合,拟合曲线与实验测定值相关性良好,得到动力学参数:NO_2^--N最大比降解速率为0.0066mg NO_2^--N/(mg MLVSS·h),有机物半饱和常数为76.35mg/L,NO_2^--N半饱和常数为0.66mg/L.Biodegradation of pyridine and phenol was carried out in batch-scale experiment. The kinetics of short-cut denitrification process was studied using a mixture of pyridine and phenol as electron donor and NO2^-N as electron acceptor. Experimental results showed that pyridine degradation was inhibited in the presence of phenol. Further investigation revealed that the pyridine degradation, no matter whether co-metabolized with phenol, fitted the zero-order kinetics model. However, the COD and NO2^-N concentrations fitted the double-substrate Monod model, with the predicted and measured values showed a good correlation. The maximum specific degradation rate was 0.0067 mg NO2^-N /（mg MLVSS·h）, and the half saturation coefficient for organic substance and nitrite nitrogen were 76.35mg/L and 0.66mg/L, respectively.

关 键 词：吡啶 苯酚 共基质 短程反硝化 动力学 

分 类 号：X703[环境科学与工程—环境工程]